Mt St Helens Flashcards
1
Q
Date of eruption
A
18th May 1980
2
Q
Deaths?
A
Approx 57, including Harry Truman with his cats
3
Q
how many 2.6 or higher quakes were there in the 2 days before the eruption
A
174
4
Q
What is the name of the bulge that grew on the side
A
cryptodome
5
Q
Size of the earthquake that triggered the landslide
A
5.1
6
Q
Speed of landslide
A
110-155 mp/h, it was the largest recorded landslide in history
7
Q
How much land did the pyroclastic flows destroy
A
23x19 miles in a fan shape outward from the volcano
